//
//  BluetoothViewController.m
//  TestDemo
//
//  Created by fengxijun on 3/9/16.
//  Copyright © 2016 goappbox. All rights reserved.
//

#import "BluetoothViewController.h"

@interface BluetoothViewController ()
<
    CBCentralManagerDelegate,
    CBPeripheralDelegate
>
{
    CBCentralManager *bluetoothCentralManager;
}

@end

@implementation BluetoothViewController

-(void)viewDidLoad
{
    [super viewDidLoad];
    bluetoothCentralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
}

#pragma mark --CBCentralManagerDelegate
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    NSLog(@"%s",__PRETTY_FUNCTION__);
    switch (central.state) {
        case CBCentralManagerStateUnknown:
        {
            NSLog(@">>>CBCentralManagerStateUnknown");
        }
            break;
        case CBCentralManagerStateResetting:
        {
            NSLog(@">>>CBCentralManagerStateResetting");
        }
            break;
        case CBCentralManagerStateUnsupported:
        {
            NSLog(@">>>CBCentralManagerStateUnsupported");
        }
            break;
        case CBCentralManagerStateUnauthorized:
        {
            NSLog(@">>>CBCentralManagerStateUnauthorized");
        }
            break;
        case CBCentralManagerStatePoweredOff:
        {
            NSLog(@">>>CBCentralManagerStatePoweredOff");
        }
            break;
        case CBCentralManagerStatePoweredOn:
        {
            NSLog(@">>>CBCentralManagerStatePoweredOn");
            
            [bluetoothCentralManager scanForPeripheralsWithServices:nil options:nil];
        }
            break;
        default:
            break;
    }
}


- (void)centralManager:(CBCentralManager *)central willRestoreState:(NSDictionary<NSString *,id> *)dict
{
    NSLog(@"%s ==> %@",__PRETTY_FUNCTION__, dict);
}

-(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI
{
    NSLog(@"%s ==> %@ : %@ : %@",__PRETTY_FUNCTION__, peripheral.name,advertisementData, RSSI);
    //接下连接我们的测试设备，如果你没有设备，可以下载一个app叫lightbule的app去模拟一个设备
    //这里自己去设置下连接规则，我设置的是P开头的设备
    if ([peripheral.name hasPrefix:@"P"]) {
        /*
         一个主设备最多能连7个外设，每个外设最多只能给一个主设备连接,连接成功，失败，断开会进入各自的委托
         - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral;//连接外设成功的委托
         - (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//外设连接失败的委托
         - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//断开外设的委托
         */
        //连接设备
    }
    [central connectPeripheral:peripheral options:nil];
}

- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
    NSLog(@"%s ==> %@",__PRETTY_FUNCTION__, peripheral.name);
    NSLog(@">>>连接到名称为（%@）的设备-成功",peripheral.name);
    [peripheral discoverServices:nil];
}

- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(nullable NSError *)error
{
    NSLog(@"%s ==> %@ : %@",__PRETTY_FUNCTION__, peripheral.name, [error localizedDescription]);
    NSLog(@">>>连接到名称为（%@）的设备-失败,原因:%@",[peripheral name],[error localizedDescription]);
}

- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(nullable NSError *)error
{
    NSLog(@"%s ==> %@ : %@",__PRETTY_FUNCTION__, peripheral.name, [error localizedDescription]);
    NSLog(@">>>外设连接断开连接 %@: %@\n", [peripheral name], [error localizedDescription]);
}

#pragma mark --CBPeripheralDelegate

//扫描到Services
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
    //  NSLog(@">>>扫描到服务：%@",peripheral.services);
    if (error)
    {
        NSLog(@">>>Discovered services for %@ with error: %@", peripheral.name, [error localizedDescription]);
        return;
    }
    
    for (CBService *service in peripheral.services) {
        NSLog(@"%@",service.UUID);
        //扫描每个service的Characteristics，扫描到后会进入方法： -(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
        [peripheral discoverCharacteristics:nil forService:service];
    }
    
}

//扫描到Characteristics
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{
    if (error)
    {
        NSLog(@"error Discovered characteristics for %@ with error: %@", service.UUID, [error localizedDescription]);
        return;
    }
    
    for (CBCharacteristic *characteristic in service.characteristics)
    {
        NSLog(@"service:%@ 的 Characteristic: %@",service.UUID,characteristic.UUID);
    }
    
    //获取Characteristic的值，读到数据会进入方法：-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
    for (CBCharacteristic *characteristic in service.characteristics){
        {
            [peripheral readValueForCharacteristic:characteristic];
        }
    }
    
    //搜索Characteristic的Descriptors，读到数据会进入方法：-(void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
    for (CBCharacteristic *characteristic in service.characteristics){
        [peripheral discoverDescriptorsForCharacteristic:characteristic];
    }
    
    
}

//获取的charateristic的值
-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    //打印出characteristic的UUID和值
    //!注意，value的类型是NSData，具体开发时，会根据外设协议制定的方式去解析数据
    NSLog(@"characteristic uuid:%@  value:%@",characteristic.UUID,characteristic.value);
    
}

//搜索到Characteristic的Descriptors
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    
    //打印出Characteristic和他的Descriptors
    NSLog(@"characteristic uuid:%@",characteristic.UUID);
    for (CBDescriptor *d in characteristic.descriptors) {
        NSLog(@"Descriptor uuid:%@",d.UUID);
    }
    
}
//获取到Descriptors的值
-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForDescriptor:(CBDescriptor *)descriptor error:(NSError *)error{
    //打印出DescriptorsUUID 和value
    //这个descriptor都是对于characteristic的描述，一般都是字符串，所以这里我们转换成字符串去解析
    NSLog(@"characteristic uuid:%@  value:%@",[NSString stringWithFormat:@"%@",descriptor.UUID],descriptor.value);
}

//写数据
-(void)writeCharacteristic:(CBPeripheral *)peripheral
            characteristic:(CBCharacteristic *)characteristic
                     value:(NSData *)value{
    
    //打印出 characteristic 的权限，可以看到有很多种，这是一个NS_OPTIONS，就是可以同时用于好几个值，常见的有read，write，notify，indicate，知知道这几个基本就够用了，前连个是读写权限，后两个都是通知，两种不同的通知方式。
    /*
     typedef NS_OPTIONS(NSUInteger, CBCharacteristicProperties) {
     CBCharacteristicPropertyBroadcast= 0x01,
     CBCharacteristicPropertyRead= 0x02,
     CBCharacteristicPropertyWriteWithoutResponse= 0x04,
     CBCharacteristicPropertyWrite= 0x08,
     CBCharacteristicPropertyNotify= 0x10,
     CBCharacteristicPropertyIndicate= 0x20,
     CBCharacteristicPropertyAuthenticatedSignedWrites= 0x40,
     CBCharacteristicPropertyExtendedProperties= 0x80,
     CBCharacteristicPropertyNotifyEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0)= 0x100,
     CBCharacteristicPropertyIndicateEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0)= 0x200
     };
     
     */
    NSLog(@"%lu", (unsigned long)characteristic.properties);
    
    
    //只有 characteristic.properties 有write的权限才可以写
    if(characteristic.properties & CBCharacteristicPropertyWrite){
        /*
         最好一个type参数可以为CBCharacteristicWriteWithResponse或type:CBCharacteristicWriteWithResponse,区别是是否会有反馈
         */
        [peripheral writeValue:value forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
    }else{
        NSLog(@"该字段不可写！");
    }
    
    
}

//设置通知
-(void)notifyCharacteristic:(CBPeripheral *)peripheral
             characteristic:(CBCharacteristic *)characteristic{
    //设置通知，数据通知会进入：didUpdateValueForCharacteristic方法
    [peripheral setNotifyValue:YES forCharacteristic:characteristic];
    
}

//取消通知
-(void)cancelNotifyCharacteristic:(CBPeripheral *)peripheral
                   characteristic:(CBCharacteristic *)characteristic{
    
    [peripheral setNotifyValue:NO forCharacteristic:characteristic];
}

//停止扫描并断开连接
-(void)disconnectPeripheral:(CBCentralManager *)centralManager
                 peripheral:(CBPeripheral *)peripheral{
    //停止扫描
    [centralManager stopScan];
    //断开连接
    [centralManager cancelPeripheralConnection:peripheral];
}

@end
